(1)
7488÷36*16
=208×16
=200×16+8×16
=3200+128
=3328
(2)
5/11+5/8+6/11+3/8
=(5/11+6/11)+(5/8+3/8)
=1+1
=2
(3)
(5.4-2.4÷3)*0.5
=(5.4-0.8)×0.5
=4.6×0.5
=2.3
(4)
1÷(3/8+1/12)÷9/22
=1÷11/24÷9/22
=1×24/11×22/9
=16/3
(5)
4/9*【0.75-(7/16-0.25)】
=4/9×【0.75-7/16+0.25】
=4/9×【1-7/16】
=4/9×9/16
=1/4
(6)
1985/2012*2013
=1985/2012×(2012+1)
=1985/2012×2012+1985/2012×1
=1985+1985/2012
=1985又1985/2012
脱式计算,能简便的用简便方法计算(要过程)
脱式计算,能简便的用简便方法计算(要过程)
(1)7488÷36*16(2)5/11+5/8+6/11+3/8(3)(5.4-2.4÷3)*0.5
(4)1÷(3/8+1/12)÷9/22(5)4/9*【0.75-(7/16-0.25)】(6)1985/2012*2013
(1)7488÷36*16(2)5/11+5/8+6/11+3/8(3)(5.4-2.4÷3)*0.5
(4)1÷(3/8+1/12)÷9/22(5)4/9*【0.75-(7/16-0.25)】(6)1985/2012*2013
数学人气:948 ℃时间:2020-10-01 12:51:18
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