题目内容
算一算:(1)20+(﹣12)﹣(﹣18)
(2)23×10+(﹣2)×(﹣5)2
(3)
(4)
(5)
(6)
.
(2)23×10+(﹣2)×(﹣5)2
(3)
(4)
(5)
(6)
解:(1)原式=20﹣12+18=38﹣12=26.
(2)原式=8×10﹣2×25=80﹣50=30.
(3)原式=
=﹣3+2=﹣1.
(4)原式=
=﹣27﹣20+21=﹣26.
(5)原式=
=
=
=
=
(6)原式=
=
=
=
=﹣1+20+8
=27.
(2)原式=8×10﹣2×25=80﹣50=30.
(3)原式=
(4)原式=
(5)原式=
=
=
=
=
(6)原式=
=
=
=
=﹣1+20+8
=27.
练习册系列答案
相关题目