脱式计算(能简算就用简便方法计算)8.5+1.5×2+1÷0.4 6.9×3.6-4.84÷0.4  ...
答案:1 悬赏:30 手机版
解决时间 2021-04-05 01:24
- 提问者网友:焚苦与心
- 2021-04-04 18:31
脱式计算(能简算就用简便方法计算)8.5+1.5×2+1÷0.4 6.9×3.6-4.84÷0.4  ...
最佳答案
- 五星知识达人网友:野慌
- 2021-04-04 19:12
(1)8.5+1.5×2+1÷0.4
=8.5+3+2.5
=(8.5+2.5)+3
=11+3
=14
(2)6.9×3.6-4.84÷0.4
=24.84-12.1
=12.74
(3)4.75+8.4÷(9.2-6.8)
=4.75+8.4÷2.4
=4.75+3.5
=8.25
(4)1.25×64
=(1.25×8)×8
=10×8
=80
(5)1.9×2.34+1.9×7.66
=1.9×(2.34+7.66)
=1.9×10
=19
=8.5+3+2.5
=(8.5+2.5)+3
=11+3
=14
(2)6.9×3.6-4.84÷0.4
=24.84-12.1
=12.74
(3)4.75+8.4÷(9.2-6.8)
=4.75+8.4÷2.4
=4.75+3.5
=8.25
(4)1.25×64
=(1.25×8)×8
=10×8
=80
(5)1.9×2.34+1.9×7.66
=1.9×(2.34+7.66)
=1.9×10
=19
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