4.05＋37.85 1.25x0.7×0.28。 6.1×3.6+3.6×3.9
展开全部
4.05＋37.85
=41.9
1.25x0.7×0.28
=1.25×0.7×4×0.7
=(1.25×4)×(0.7×0.7)
=5×0.49
=2.45
6.1×3.6+3.6×3.9
=3.6×(6.1+3.9)
=3.6×10
=36
=41.9
1.25x0.7×0.28
=1.25×0.7×4×0.7
=(1.25×4)×(0.7×0.7)
=5×0.49
=2.45
6.1×3.6+3.6×3.9
=3.6×(6.1+3.9)
=3.6×10
=36
追答
4.05＋37.85
=41.9
1.25x0.7×0.28
=1.25×0.7×4×0.07
=(1.25×4)×(0.7×0.07)
=5×0.049
=0.245
6.1×3.6+3.6×3.9
=3.6×(6.1+3.9)
=3.6×10
=36
不好意思，第一次第二题有误。
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