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简介:
9.8×1.2+9.8×18.8
=9.8×(1.2+18.8)
=9.8×20
=196
2.5×26.8×4
=(2.5×4)×26.8
=10×26.8
=268
3.26×5.7-3.26×0.7
=3.26×(5.7-0.7)
=3.26×5
=16.3
0.39×101
=0.39×(100+1)
=0.39×100+0.39×1
=39+0.39
=39.39
0.25×7.05×0.4
=0.25×7.05×0.4
=0.25×0.4×7.05
=0.1×7.05
=0.705
5.1×10.3
=5.1×(10+0.3)
=5.1×10+5.1×0.3
=51+1.53
=52.53
5.7×4.8+5.2×5.7
=5.7×(4.8+5.2)
=5.7×10
=57
8×3.7×0.125
=(8×0.125)×3.7
=1×3.7
=3.7 0.25×9.8×40
=(0.25×40)×9.8
=10×9.8
=98