49.1×8.56+49.1×1.44
=49.1x(8.56+1.44)
=49.1x10
=491
1.25×88
=1.25x8x11
=10x11
=110
8.07×101
=8.07x100+8.07x1
=807+8.07
=815.07
=49.1x(8.56+1.44)
=49.1x10
=491
1.25×88
=1.25x8x11
=10x11
=110
8.07×101
=8.07x100+8.07x1
=807+8.07
=815.07
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第1个回答 2015-09-16
步骤太多追答
没法说
追问49.1×8.56+49.1×1.44
1.25×88
8.07×101
这三题用简便方法计算，谢谢
追答用国号把8.56和1.44家起来在称49.1
4分之5 称88
8.07×（100+1)
8.07×100+8.07×1
807+8.07=815.07
49.1×8.56+49.1×1.44 1.25×88 8.07×101 用简便方法计算
49.1×8.56+49.1×1.44 =49.1x(8.56+1.44)=49.1x10 =491 1.25×88 =1.25x8x11 =10x11 =110 8.07×101 =8.07x100+8.07x1 =807+8.07 =815.07
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