计算下面各题能简便的要简便计算。
- 你的回答被采纳后将获得:
- 系统奖励15(财富值+成长值)+难题奖励20(财富值+成长值)
2个回答
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89×3/88
=(88+1)×3/88
=88×3/88+3/88
=83+3/88
=3又3/88
2/9×0.375÷6/7
=2/9×3/8×7/6
=1/12×7/6
=7/72
9/13×1/7+6/7×9/13
=9/13×(1/7+6/7)
=9/13×1
=9/13
(3-1.4)÷8/15
=1.6×15/8
=3
2/7×5/9×(18×14)
=(2/7×14)×(5/9×18)
=4×10
=40
65×(1/13+3/5)
=65×1/13+65×3/5
=5+39
=44
=(88+1)×3/88
=88×3/88+3/88
=83+3/88
=3又3/88
2/9×0.375÷6/7
=2/9×3/8×7/6
=1/12×7/6
=7/72
9/13×1/7+6/7×9/13
=9/13×(1/7+6/7)
=9/13×1
=9/13
(3-1.4)÷8/15
=1.6×15/8
=3
2/7×5/9×(18×14)
=(2/7×14)×(5/9×18)
=4×10
=40
65×(1/13+3/5)
=65×1/13+65×3/5
=5+39
=44
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