作业帮数学简便计算 6题
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数学简便计算 6题
数学简便计算 6题
数学简便计算 6题
3/5 x4 ÷2/5
=4x3/5 ÷2/5
=4x3÷2
=6
(1/4+2/3)÷ 11/24
=(1/4+2/3)x24/11
=(1/4)x24/11+(2/3)x24/11
=6/11+16/11
=22/11
=2
(1/4)÷(1/5)-3/4
=(1/4)x5-3/4
=5/4-3/4
=2/4
=1/2
(4/3)x7/8-(1/3)x7/8
=(4/3-1/3)x7/8
=7/8
(5/7)÷(3/4)÷(5/7)
=(5/7)÷(5/7)÷(3/4)
=1÷(3/4)
=4/3
(7/16+13/24)x48
=7x3+13x2
=21+26
=47
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先乘再除再加减，先括号内再括号外
先乘再除再加减，先括号内再括号外
(1)原式=12/5×5/2=6
(2)原式=(3/12+8/12)×24/11=1
(3)原式=5/4-3/4=2/4=1/2
(4)原式=(4/3-1/3)×7/8=1×7/8=7/8
(5)原式=5/7×4/3×7/5=5/7×7/5×4/3=4/3
(6)原式=7/16×48+13/24×48=7×3+13×2=47