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用简便方法计算:1.2×2.5+0.8×2.53.25-0.84-0.1663×10.1.
题目详情
用简便方法计算:
1.2×2.5+0.8×2.5
3.25-0.84-0.16
63×10.1.
1.2×2.5+0.8×2.5
3.25-0.84-0.16
63×10.1.
▼优质解答
答案和解析
(1)1.2×2.5+0.8×2.5
=(1.2+0.8)×2.5
=2×2.5
=5
(2)3.25-0.84-0.16
=3.25-(0.84+0.16)
=3.25-1
=2.25
(3)63×10.1.
=(63×10)+(63×0.1)
=630+6.3
=636.3
=(1.2+0.8)×2.5
=2×2.5
=5
(2)3.25-0.84-0.16
=3.25-(0.84+0.16)
=3.25-1
=2.25
(3)63×10.1.
=(63×10)+(63×0.1)
=630+6.3
=636.3
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