0.26减9.8,有哪两种简便算法?
1个回答
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(1)
10.26-9.8
= 10.26-(10-0.2)
=10.26-10+0.2
= 0.26+0.2
= 0.46
(2)
10.26-9.8
=10+0.26-9.8
= 10-9.8+0.26
=0.2+0.26
=0.46
10.26-9.8
= 10.26-(10-0.2)
=10.26-10+0.2
= 0.26+0.2
= 0.46
(2)
10.26-9.8
=10+0.26-9.8
= 10-9.8+0.26
=0.2+0.26
=0.46
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