42x5⼀7÷42x5⼀7(脱式计算，能简算的要简算)
推荐回答（3个）
(382X26分之7+0.618X26分之7)X3又7分之5=（382*7/26+0.618*7/26）*26/7=382+0.618=382.6185分之4+25分之3X21分之5+5分之3X2=4/5+3/25*5/21+3/5*2=4/5+1/35+6/5=28/35+1/35+42/35=71/35333X332332332-332X333333333=333X333333333-333*1001001-（333X333333333-333333333）=-333*1001001+333333333=0(0.4+3分之1）÷（0.4-3分之1）X0.1=（3*0.4+1）/（3*0.4-1）*0.1=2.2/0.2*0.1=1.12分之1X3分之1+3分之1X4分之1+4分之1X5分之1+……+99分之1X100分之1=1/2*1/3+1/3*1/4+1/4*1/5+1/99*1/100=（1/2-1/3）+（1/3-1/4）+（1/4-1/5）+..+（1/99-1/100）=1/2-1/100=49/100
42x［（129-31）÷14］用简算
解：直接运算最简便，
原式=42x[98÷14]
=42x7
=294
=42÷42x5/7x5/7
=1x5/7x5/7
=25/49
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