列式计算.(1)用4.35与3.65的和,去除它们的差,结果是几?(2)48减去1.2与5的积后,再去除21,商是多

2024-11-22 11:42:02
推荐回答(1个)
回答1:

(1)(4.35-3.65)÷(4.35+3.65)
=0.7÷8
=0.0875
答:结果是0.0875.

(2)90.3÷(10.2-1.2×5)
=90.3÷(10.2-6)
=90.3÷4.2
=21.5
答:商是21.5.

(3)90.3÷[10.2+(5.6-2.9)]
=90.3÷[10.2+2.7]
=90.3÷12.9
=7
答:商是7.

(4)(37+23)×(3.6-2.8)
=60×0.8
=48
答:积是48.