四年级下册数学简便运算练习题答案
四年级下册数学简便运算练习题答案
推荐回答(2个)
四年级下册数学学习的是加法和乘法的混合运算,练习题目可以分为五个种类:
第一种:
(300+6)x12=3672
25x(4+8)=300
125x(35+8) =5375
(13+24)x8 =296
第二种 :
84x101=8484
504x25=12600
78x102=7956
25x204= 5100
第三种:
99x64=6336
99x16=1584
638x99=63162
999x99=98901
第四种:
99X13+13=1300
25+199X25=5000
32X16+14X32=960
78X4+78X3+78X3 =780
第五种:
125X32X8=32000
25X32X125=100000
88X125=11000
72X125=9000

运算定律:
1、加法交换律:两个加数交换位置,和不变.这叫做加法交换律。用字母表示:a+b=b+a
2、加法结合律:三个数相加,先把前两个数相加,或者先把后两个数相加,和不变。这叫做加法结合律。用字母表示:(a+b)+c= a +( b+c)
3、乘法交换律:两个因数交换位置,积不变,这叫做乘法交换律。用字母表示:a×b=b×a
4、乘法结合律:三个数相乘,先把前两个数相乘,或者先把后两个数相乘,积不变,这叫做乘法结合律。用字母表示:(a×b)×c= a ×( b×c)
5、乘法分配律:两个数的和与一个数相乘,可以先把它们与这个数分别相乘,再相加,这叫做乘法分配律。用字母表示:(a+b)×c= a×c+b×c
158+262+138 375+219+381+225 5001-247-1021-232
(181+2564)+2719 378+44+114+242+222 276+228+353+219
(375+1034)+(966+125) (2130+783+270)+1017 99+999+9999+99999
7755-(2187+755) 2214+638+286 3065-738-1065
899+344 2357-183-317-357 2365-1086-214
497-299 2370+1995 3999+498
1883-398 12×25 75×24
138×25×4 (13×125)×(3×8) (12+24+80)×50
简便计算练习题2
姓名 得分
704×25 25×32×125 32×(25+125)
88×125 102×76 58×98
178×101-178 84×36+64×84 75×99+2×75
83×102-83×2 98×199 123×18-123×3+85×123
50×(34×4)×3 25×(24+16) 178×99+178
79×42+79+79×57 7300÷25÷4 8100÷4÷75
16800÷120 30100÷2100 32000÷400 21500÷125
49700÷700 1248÷24 3150÷15 4800÷25
简便计算练习题3
姓名 得分
2356-(1356-721) 1235-(1780-1665) 75×27+19×2 5
31×870+13×310 4×(25×65+25×28)
第一种
(300+6)x12 25x(4+8) 125x(35+8) (13+24)x8
第二种
84x101 504x25 78x102 25x204
第三种
99x64 99x16 638x99 999x99
第四种
99X13+13 25+199X25 32X16+14X32 78X4+78X3+78X3
第五种
125X32X8 25X32X125 88X125 72X125
简便计算练习题4
姓名 得分
第六种
3600÷25÷4 8100÷4÷75 3000÷125÷8 1250÷25÷5
第七种
1200-624-76 2100-728-772 273-73-27 847-527-273
第八种
278+463+22+37 732+580+268 1034+780320+102 425+14+186
第九种
214-(86+14) 787-(87-29) 365-(65+118) 455-(155+230)
第十种
576-285+85 825-657+57 690-177+77 755-287+87
第十一种
871-299 157-99 363-199 968-599
第十二种
178X101-178 83X102-83X2 17X23-23X7 35X127-35X16-11X35
简便计算练习题5
姓名 得分
容易出错类型(共五种类型)
600-60÷15 20X4÷20X4 736-35X20 25X4÷25X4
98-18X5+25 56X8÷56X8 280-80÷ 4 12X6÷12X6
175-75÷25 25X8÷25X8 80-20X2+60 36X9÷36X9
36-36÷6-6 25X8÷(25X8) 100+45-100+45 15X97+3
100+1-100+1 48X99+1 1000+8-1000+8 5+95X28
102+1-102+1 65+35X13 25+75-25+75 40+360÷20-10
13+24X8 672-36+64 324-68+32 100-36+64
简便计算练习题6
姓名 得分
26×39+61×26 356×9-56×9 99×55+55
78×101-78 52×76+47×76+76 134×56-134+45×134
48×52×2-4×48 25×23×(40+4) 999×999+1999
184+98 695+202 864-199 738-301
380+476+120 (569+468)+(432+131) 704×25
256-147-53 373-129+29 189-(89+74)
28×4×25 125×32×25 9×72×125
简便计算练习题7
姓名 得分
720÷16÷5 630÷42 456-(256-36)
102×35 98×42 158+262+138 375+219+381+225
5001-247-1021-232 (181+2564)+2719 378+44+114+242+222
276+228+353+219 (375+1034)+(966+125) (2130+783+270)+1017
99+999+9999+99999 7755-(2187+755) 2214+638+286
3065-738-1065 899+344 2357-183-317-357
2365-1086-214 497-299 2370+1995
简便计算练习题8
姓名 得分
3999+498 1883-398 12×25 75×24
138×25×4 (13×125)×(3×8) (12+24+80)×50
25×32×125 32×(25+125) 88×125 102×76
178×101-178 84×36+64×84 75×99+2×75
98×199 123×18-123×3+85×123 50×(34×4)×3
25×(24+16) 178×99+178 79×42+79+79×57
7300÷25÷4 8100÷4÷75 158+262+138
简便计算练习题9
姓名 得分
1248÷24 3150÷15 4800÷25 21500÷125
375+219+381+225 5001-247-1021-232 (181+2564)+2719
378+44+114+242+222 276+228+353+219 (375+1034)+(966+125)
(2130+783+270)+1017 99+999+9999+99999 7755-(2187+755)
2214+638+286 3065-738-1065 899+344
2357-183-317-357 2365-1086-214 497-299
2370+1995 3999+498 1883-398
简便计算练习题10
姓名 得分
12×25 75×24 138×25×4 (13×125)×(3×8)
(12+24+80)×50 704×25 25×32×125 32×(25+125)
88×125 102×76 58×98 178×101-178
84×36+64×84 75×99+2×75 83×102-83×2 98×199
123×18-123×3+85×123 50×(34×4)×3 25×(24+16)
178×99+178 79×42+79+79×57 21500÷125
7300÷25÷4 8100÷4÷75 16800÷120
简便计算练习题11
姓名 得分
(a+b)+ c = a +(b+c)
2.73 + 0.89 + 1.27 4.37 + 0.28 + 1.63 + 5.72
a-b-c = a -(b+c)
10 - 0.432 - 2.568 9.3 - 5.26 - 2.74
14.9-(5.2+4.9) 18.32 - 5.47 - 4.32
(a × b)×c = a ×(b × c)
25 × 6.8 × 0.04 0.25 × 32 × 0.125 6.4 × 1.25 × 12.5
c ×(a+b)= c×a + c×b
0.45 × 201 0.58 × 10.1 50.2 × 99 4.7 × 9.9
简便计算练习题12
姓名 得分
3.28 × 5.7 + 6.72 × 5.7 2.1 × 99 + 2.1
23 × 0.1 + 2.3 × 9.9 0.18 +4.26 -0.18 +4.26
0.58 ×1.3 ÷ 0.58 ×1.3 7.3 ÷4 + 2.7 × 0.25
3.75 × 0.5 - 2.75 ÷ 2 5.26 × 0.125 + 2.74 ÷ 8
a ÷ b ÷ c = a ÷ (b × c)
6.3 ÷ 1.8 9.5 ÷(1.9 × 8) 12.8 ÷ (0.4 × 1.6)
930 ÷ 0.6 ÷5 63.4 ÷ 2.5 ÷ 0.4 (7.7 + 1.54)÷ 0.7
简便计算练习题13
姓名 得分
6.9+4.8+3.1 15.89+(6.75-5.89) 7.85+2.34-0.85+4.66
35.6-1.8-15.6-7.2 13.75-(3.75+6.48) 47.8-7.45+2.55
66.86-8.66-1.34 0.25×16.2×4 0.25×32 ×0.125
2 .5 ×(4 +0.4) (1.25-0.125)×8 4.8×100.1
4.2×99 56.5×9.9+56.5 7.09×10.8-0.8×7.09
3.83×4.56+3.83×5.44 3.65×4.7-36.5×0.37 5.4×11-5.4
13.7×0.25-3.7÷4 10.7×16.1-1.1×10.7 +10.7 ×5
运算定律和性质
1、加法交换律:两个加数交换位置,和不变.这叫做加法交换律.
用字母表示:a+b=b+a
2、加法结合律:三个数相加,先把前两个数相加,或者先把后两个数相加,和不变.这叫做加法结合律.
用字母表示:(a+b)+c= a +( b+c)
3、乘法交换律:两个因数交换位置,积不变.这叫做乘法交换律.
用字母表示:a×b=b×a
4、乘法结合律:三个数相乘,先把前两个数相乘,或者先把后两个数相乘,积不变.这叫做乘法结合律.
用字母表示:(a×b)×c= a ×( b×c)
5、乘法分配律:两个数的和与一个数相乘,可以先把它们与这个数分别相乘,再相加.这叫做乘法分配律.
用字母表示:(a+b)×c= a×c+b×c
a ×( b+c) =a×b+a×c
拓展: (a-b)×c= a×c-b×c
a ×( b-c) =a×b-a×c
6、减法的性质:一个数连续减去两个数,可以减去这两个减数的和.
用字母表示: a-b-c= a -( b+c) a -( b+c) = a-b-c
7、一个数连续减去两个数,可以先减去第二个减数,再减去第一个减数.
用字母表示:a-b-c= a- c – b
8、除法的性质:一个数连续除以两个数,可以除以这两个除数的积.
用字母表示: a÷b÷c= a ÷( b×c) a ÷( b×c) = a÷b÷c
9、一个数连续除以两个数,可以先除以第二个除数,再除以第一个除数.
用字母表示:a÷b÷c= a÷ c ÷ b
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