1樓:yzwb我愛我家
(1)1/4÷[(1/3+5/6)]*2/7=1/4×7/6×2/7
=1/12
(2)3/5*[(7/12-1/3)÷3/4]=3/5*(1/4*4/3)
=3/5*1/3
=1/5
(3)1-5/3÷5/2-1/3
=1-5/3*2/5-1/3
=1-(2/3+1/3)
=1-1
=0祝你開心
脫式計算(能簡算的要簡算) ⑴1/4÷(2/3-3/2×1/3) ⑵24×(1/6+3/8+7/
2樓:昨夜星辰吉日
⑴1/4÷(2/3-3/2×1/3)
=1/4÷(2/3-1/2)=1/4÷(4/6-3/6)=1/4÷1/6=1/4x6=6/4=3/2;
⑵24×(1/6+3/8+7/12)=24x1/6+24x3/8+24x7/12=4+9+14=27;
⑶1/8×58+1/8×41+1/8=1/8x(58+41+1)=1/8x100=100/8=12.5.
3樓:
⑴1/4÷(2/3-3/2×1/3)=3/2
⑵24×(1/6+3/8+7/12)=27
⑶1/8×58+1/8×41+1/8=25/2
4樓:匿名使用者
(1)1/4÷(2/3一3/2×1/3)=1/4÷(4/6一3/6)=1/4×6/1=3/2
(簡算) (7/15-1/3)÷(1/3+1/5) (3/4+1/2)÷5/8 2/13+3/4÷9/10+1/6 [3/4-(5/8-1/4)]÷3/8
5樓:妙酒
(7/15-1/3)÷(1/3+1/5)
=(7-5)÷
(5+3)
=1/4
(3/4+1/2)÷5/8
=3/4x8/5+1/2x8/5
=6/5+4/5
=22/13+3/4÷9/10+1/6
=2/13+5/6+1/6
=2/13+1
=1又2/13
[3/4-(5/8-1/4)]÷3/8
=(3/4+1/4-5/8)x8/3
=3/8x8/3=1
計算下面各題,能簡算的要簡算。 45×(3/5+5/9) 3/14÷【6/7×(1/3+1/4)】 (7/3+7/4-7/12)×6/7
6樓:匿名使用者
45×(3/5+5/9) = 45×8/9 = 40
3/14÷【6/7×(1/3+1/4)】= 3/14÷【6/7×12/7】= 3/14÷2 = 3/28
(7/3+7/4-7/12)×6/7 = 7/3×6/7+7/4×6/7-7/12×6/7 = 2+3/2-1/2 = 3
(2/3-5/9×3/5)÷7/16 =(2/3-1/3)÷7/16 = 1/3*16/7 = 16/21
1/9×3+1/9×5+1/9 = 3/9+5/9+1/9 = 9/9 = 1
7/8×3/7+7/8 = 3/8+7/8 = 10/8 = 5/4
(1/2+11/8×3/2)÷1/2 = (1/2+11/8×3/2)×2 = 1/2×2+11/8×3/2×2 = 1 + 33/8 = 41/8
(1/3+1/5+1/15)×15 = 1/3×15 +1/5×15+1/15×15 = 5+3+1 = 9
能簡算要簡算(1)(4/5-1/2*4/5)÷2/3、(2)(1/6+1/8)*24*1/7、(3)128*17/126
7樓:淺唱年華
(1)3/5 (2)1 (3)1088/63
8樓:匿名使用者
(1)=(4/5-2/5)x3/2
=2/5x3/2
=3/5
(2)=1/6*24*1/7+1/8*24*1/7=4*1/7+3*1/7
=4/7+3/7
=1(3)
=127*64/63
=8128/63
9樓:
(bai1)(du4/5-1/2*4/5)÷zhi2/3=(1-1/2)*4/5×
dao3/2=1/2×4/5×3/2=3/5(回2)(1/6+1/8)*24*1/7=(1/6*24+1/8*24)*1/7=(4+3)*1/7=7*1/7=1
(3)128*17/126=(126+2)*17/126=17+2*17/126=17+17/63=17又
答17/63
脫式計算,能簡算要簡算 (1)3/8+3/4*2/3÷6、(2)3-1÷(5/7+6/7*1/3)、(3)1.75*6/7+3/14*7/4+7/4
10樓:雪中送炭新野
(1)3/8+3/4*2/3÷6
=3/8+1/2×1/6
=3/8+1/12
=11/24
(2)3-1÷(5/7+6/7*1/3)
=3-1÷(5/7+2/7)
=3-1
=2(3)1.75*6/7+3/14*7/4+7/4=7/4*(6/7+3/14+1)
=7/4*29/14
=29/8
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