1樓:手機使用者
(1)7.32-(3.8+1.32),
=7.32-1.32-3.8,
=6-3.8,
=2.2;
(2)95.6×18-953
5×8,
=95.6×18-190.6×8
=1720.8-1524.8,
=196;
(3)(1-16×3
7)÷56
,=(1-1
14)÷56,
=1314×65
,=3935;
(4)1.5÷[1.2-(0.4+0.5)],=1.5÷[1.2-0.9],
=1.5÷0.3,
=5;(5)0.125×2+6.6÷8-12.5%,=0.125×2+6.6×0.125-0.125,=0.125×(2+6.6-1),
=0.125×7.6,
=0.125×8×0.95,
=1×0.95,
=0.95;
(6)6.7×0.25+9.3÷4,
=6.7×0.25+9.3×14,
=(6.7+9.3)×14
,=16×14,=4.
脫式計算,能簡算的要簡算?
2樓:歡歡喜喜
脫式計算是一個數學學科術語,即遞等式計算,把計算過程完整寫出來的運算,也就是脫離豎式的計算。
(1)2/3+1/4+3/8
=16/24+6/24+9/24
=31/24。
(2)2/5+5/6-2/3
=12/30+25/30-20/30
=17/30。
(3)7/8-(5/12+1/3)
=7/8-(5/12+4/12)
=7/8-9/12
=7/8-6/8
=1/8。
(4)4/5-2/15-7/15
=12/15-2/15-7/15
=3/15
=1/5。
(5)2/15+3/8+7/15+5/8
=(2/15+7/15)+(3/8+5/8)=9/15+1
=3/5+1
=1又5分之3。
脫式計算(能簡算的要簡算)1.25×3.2×8 ...
3樓:你猜
(1)1.25×3.2×8
=1.25×8×3.2
=10×3.2
=32;
(2)0.45×6.2+3.8×0.45
=0.45×(6.2+3.8)
=0.45×10
=4.5;
(3)2.7×9.9
=2.7×(10-0.1)
=2.7×10-2.7×0.1
=27-0.27
=26.73;
(4)15×10.2
=15×(10+0.2)
=15×10+15×0.2
=150+3
=153;
(5)0.25×[(2.8+4.4)÷1.2]=0.25×[7.2÷1.2]
=0.25×6
=1.5;
(6)[32-(1.95-1.95)]÷1.6=[32-0]÷1.6
=32÷1.6
=20.
脫式計算:(能簡算的要簡算)7.8÷1.25÷80.67×99+0.673.76×2.9-1.9×3.762.5×3.2×1.250.38+9.62÷3
4樓:kyoya雀
(1)7.8÷1.25÷8
=7.8÷(抄
襲1.25×8)
=7.8÷10
=0.78
(2)0.67×99+0.67
=0.67×(99+1)
=0.67×100
=67(3)3.76×2.9-1.9×3.76=3.76×(2.9-1.9)
=3.76×1
=3.76
(4)2.5×3.2×1.25
=(2.5×4)×(0.8×1.25)
=10×1
=10(5)0.38+9.62÷3.7×5.2=0.38+2.6×5.2
=0.38+13.52
=13.9
(6)7.8×3.2+7.8×7.8-7.8=7.8×(3.2+7.8-1)
=7.8×10=78
脫式計算,能簡算的要簡算
5樓:東姐
(1)5020-2940÷28×37
=5020-105×37
=5020-3885
=1135
(2)56×0.25+14×16
=14×4×0.25+14×16
=14×(4×0.25+16)
=14×(1+16)
=14×17
=238
(3)36×(712+59-14)
=36×757
=27252
(4)72÷(76-72)×3
=72÷4×3
=18×3
=54(5)73
5×2.4+7.6×83
5-73
5=73
5×(2.4+83
5-1)
=7.6×(2.4+8.6-1)
=7.6×10
=76(6)(2-34×4
5)÷(1
12+415)
=(2-3
5)÷7
20=7
5×207=4
脫式計算(能簡算的要簡算
6樓:手機使用者
(1)860+140×18
=860+2520
=3380;
(2)873-(273+315)
=873-273-315
=600-315
=285;
(3)298+537
=300+537-2
=837-2
=835;
(4)487-103
=487-100-3
=387-3
=384;
(5)675÷25
=675÷5÷5
=135÷5
=27;
(6)819÷(108-99)
=819÷9
=91.
脫式計算【可以簡便的要簡便】 (1/8-3/14+1/7)*12
7樓:匿名使用者
(1/8-3/14+1/7)*12
=(1/8-3/14+2/14)×12
=(1/8-1/14)×12
=3/2-6/7
=21/14-12/14
=9/14
8樓:
(1/8-3/14+1/7)*12
=(1/8-1/14)x12
=(14/112-8/112)x12
=6/112x12
=9/14
脫式計算:(能簡算的要簡算)437×482+518×437=8.07-1.65-2.35=5.65×2.8+4.35×2
9樓:丕俏
(1)437×482+518×437,
=437×(482+518),
=437×1000,
=437000;
(2)8.07-1.65-2.35,
=8.07-(1.65+2.35),
=8.07-4,
=4.07;
(3)5.65×2.8+4.35×2.8,=(5.65+4.35)×2.8,
=10×2.8,
=28;
(4)40-3.16-(18+2.2)+10.6,=40+10.6-(3.16+20.2),=50.6-23.36,
=27.24.
脫式計算(能簡算的要簡算
10樓:軒胤
(1)6.72-2.3÷0.5×0.8
=6.72-4.6×0.8
=6.72-3.68
=3.04;
(2)98-1
7+18-6
7=(98+1
8)-(17+6
7)=54
-1=14;
(3)9
10÷[1
2×(65-3
10)]
=910
÷[12
×910]=9
10÷9
20=2;
(4)(27+1
5)×7×5=27
×7×5+1
5×7×5
=10+7
=17.
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