五年级上册的题?
2个回答
展开全部
第一张图
0.4×63×2.5
=0.4×2.5×63
=1×63
=63
3.54×9.9+3.54×0.1
=3.54×(9.9+0.1)
=3.54×10
=35.4
0.72×10.1
=0.72×(10+0.1)
=0.72×10+0.72×0.1
=7.2+0.072
=7.272
第二张图
14.6×(0.9)=0.9×(14.6)
12.5×(3.4×0.8)=(12.5×0.8)×3.4
4.36×2.5+(5.64)×2.5=(4.36+5.64)×2.5
6.5×2.4+7.6×6.5=(2.4+7.6)×6.5
第三张图
37×0.125×8
=37×(0.125×8)
=37×1
=37
0.4×63×2.5
=0.4×2.5×63
=1×63
=63
3.54×9.9+3.54×0.1
=3.54×(9.9+0.1)
=3.54×10
=35.4
0.72×10.1
=0.72×(10+0.1)
=0.72×10+0.72×0.1
=7.2+0.072
=7.272
第二张图
14.6×(0.9)=0.9×(14.6)
12.5×(3.4×0.8)=(12.5×0.8)×3.4
4.36×2.5+(5.64)×2.5=(4.36+5.64)×2.5
6.5×2.4+7.6×6.5=(2.4+7.6)×6.5
第三张图
37×0.125×8
=37×(0.125×8)
=37×1
=37
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