六年级上学期练习题 (乘法简便运算) 3.2 3.2×7 5╱9 1 4╱9×3
六年级上学期练习题(乘法简便运算)3.23.2×75╱914╱9×31╱5(分子在前分母在后,空格的是带分数)2╱25×126102╱7×1╱912012╱13×1╱12...
六年级上学期练习题
(乘法简便运算)
3.2 3.2×7 5╱9 1 4╱9×3 1╱5 (分子在前分母在后,空格的是带分数)
2╱25×126
10 2╱7×1╱9
120 12╱13×1╱12
34 1╱8×1╱7 展开
(乘法简便运算)
3.2 3.2×7 5╱9 1 4╱9×3 1╱5 (分子在前分母在后,空格的是带分数)
2╱25×126
10 2╱7×1╱9
120 12╱13×1╱12
34 1╱8×1╱7 展开
1个回答
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3.2 +3.2×7
=3.2×(1+7)
=3.2×8
=25.6
5╱9 +1 又 4╱9×3 又1╱5
=2+3又1/5
=5又1/5
2╱25×126
=2/25×(125+1)
=2/25×125+2/25
=10+2/25
=10又2/25
10 又2╱7×1╱9
=(9+9/7)×1/9
=9×1/9+9/7×1/9
=1+1/7
=1又1/7
120又12╱13×1╱12
=120×1/12+12/13×1/12
=10+1/13
=10又1/13
34 又1╱8×1╱7
=(35-7/8)
=35×1/7-7/8×1/7
=5-1/8
=4又7/8
=3.2×(1+7)
=3.2×8
=25.6
5╱9 +1 又 4╱9×3 又1╱5
=2+3又1/5
=5又1/5
2╱25×126
=2/25×(125+1)
=2/25×125+2/25
=10+2/25
=10又2/25
10 又2╱7×1╱9
=(9+9/7)×1/9
=9×1/9+9/7×1/9
=1+1/7
=1又1/7
120又12╱13×1╱12
=120×1/12+12/13×1/12
=10+1/13
=10又1/13
34 又1╱8×1╱7
=(35-7/8)
=35×1/7-7/8×1/7
=5-1/8
=4又7/8
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