计算脱式 (5/6-1/4*2/3)÷1/6 (3/8-1/4)÷(8/9*3/4) 18/35÷0.6*2/3 7/8*【1÷(7/10-7/20)】 下面简便计算4.67-(2.98+0.67) 7.85*99+7.85 (51+34/39)*2/17 7.5*0.4*25*0.8 102*7.8 14.28÷3.5÷2 2/3*1/15+14/15*2/3 97*97/98
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计算脱式 (5/6-1/4*2/3)÷1/6 (3/8-1/4)÷(8/9*3/4) 18/35÷0.6*2/3 7/8*【1÷(7/10-7/20)】 下面简便计算4.67-(2.98+0.67) 7.85*99+7.85 (51+34/39)*2/17 7.5*0.4*25*0.8 102*7.8 14.28÷3.5÷2 2/3*1/15+14/15*2/3 97*97/98
计算脱式 (5/6-1/4*2/3)÷1/6 (3/8-1/4)÷(8/9*3/4) 18/35÷0.6*2/3 7/8*【1÷(7/10-7/20)】 下面
简便计算
4.67-(2.98+0.67) 7.85*99+7.85 (51+34/39)*2/17 7.5*0.4*25*0.8 102*7.8 14.28÷3.5÷2 2/3*1/15+14/15*2/3 97*97/98
计算脱式 (5/6-1/4*2/3)÷1/6 (3/8-1/4)÷(8/9*3/4) 18/35÷0.6*2/3 7/8*【1÷(7/10-7/20)】 下面简便计算4.67-(2.98+0.67) 7.85*99+7.85 (51+34/39)*2/17 7.5*0.4*25*0.8 102*7.8 14.28÷3.5÷2 2/3*1/15+14/15*2/3 97*97/98
(5/6-1/4*2/3)÷1/6
=(5/6-1/6)×6
=4/6×6
=4
(3/8-1/4)÷(8/9*3/4)
=1/8÷2/3
=1/8×3/2
=3/16
18/35÷0.6*2/3
=18/35×5/3×2/3
=6/7×2/3
=4/7
7/8*【1÷(7/10-7/20)】
=7/8×1÷7/20
=7/8×20/7
=5/2
4.67-(2.98+0.67)
=4.67-0.67-2.98
=4-2.98
=1.02
7.85*99+7.85
=7.85×(99+1)
=7.85×100
=785
(5/6-1/4*2/3)÷1/6
=(5/6-1/6)
=5/6×6/1-1/6×6/1
=5-1
=4
(3/8-1/4)÷(8/9*3/4)
=(3/8-1/4)÷2/3
=3/8×3/2-1/4×3/2
=9/16-3/8
=9/16-6/16
=3/16
或
=(3/8-1/4)÷...
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(5/6-1/4*2/3)÷1/6
=(5/6-1/6)
=5/6×6/1-1/6×6/1
=5-1
=4
(3/8-1/4)÷(8/9*3/4)
=(3/8-1/4)÷2/3
=3/8×3/2-1/4×3/2
=9/16-3/8
=9/16-6/16
=3/16
或
=(3/8-1/4)÷2/3
=1/8×3/2
=3/16
18/35÷0.6*2/3
=18/35÷3/5×2/3
=18/35×5/2
=9/7
7/8*【1÷(7/10-7/20)】
=7/8×[1÷7/20]
=7/8×[1×20/7]
=7/8×20/7
=5/2
4.67-(2.98+0.67)
=4.67-2.98-0.67
=4-2.98
=4-(3-0.02)
=4-3+0.02
=1.02
7.85*99+7.85
=7.85(99+1)
=7.85×100
=785
(51+34/39)*2/17
=51*2/17+34/39*2/17
=3*2+4/39
=6+4/39
=6又4/39
7.5*0.4*25*0.8
=25*0.3*0.4*25*0.2*4
=25*4*25*0.4*0.3*0.2
=100*10*0.06
=60
102*7.8
=(100+2)*7.8
=780+15.6
=795.6
14.28÷3.5÷2
=14.28÷(3.5*2)
=14.28÷7
=2.04
2/3*1/15+14/15*2/3
=2/3(1/15+14/15)
=2/3×1
=2/3
97*97/98
=97×(1-1/98)
=97-97/98
=96又1/98
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