1樓:猴瞧杉
①1.8+3.84÷(15-12.6),
=1.8+3.84÷2.4,
=1.8+1.6,
=3.4;
②8×(1
18+58),
=8×1
18+8×58,
=49+5,=549;
③58÷[5×(56?3
4)],=58
÷[5×1
12],=58
÷512,=3
2;④0.4×80×2.5×0.125,
=(0.4×2.5)×(80×0.125),=1×10,
=10.
遞等式計算.(能簡算的要簡算,並寫出主要的簡算過程)①1.8+3.84÷(15-12.6) ② 8×( 1 18
2樓:喜洋洋
①1.8+3.84÷
(15-12.6),
=1.8+3.84÷2.4,
=1.8+1.6,
=3.4;
②8×(1
18+5 8
) ,=8×1
18+8×5 8
,=4 9
+5,=54 9
;③5 8
÷[5×(5 6
-3 4
)] ,
=5 8
÷[5×1
12] ,
=5 8
÷512
,=3 2
;④0.4×80×2.5×0.125,
=(0.4×2.5)×(80×0.125),=1×10,
=10.
脫式計算.(能簡算的要簡算,並寫出主要的簡便過程)(1)3.58-2.36-(2.64-1.42)(2)(14+16?13)×12
3樓:楷84修母
(1)3.58-2.36-(2.64-1.42)=3.58-2.36-2.64+1.42
=(3.58+1.42)-(2.36+2.64)=5-5
=0;(2)(14+1
6?13)×
12=1
4×12+1
6×12-1
3×12
=3+2-4
=1;(3)3.6×11
8+8.4÷8
11=3.6×11
8+8.4×11
8=(3.6+8.4)×11
8=12×11
8=332;
(4)3
4÷[3.75×(1.2?15)]
=34÷[3.75×1]=34
÷334=15.
計算下面各題,能簡算的要簡算,並寫出主要的簡算過程.(1)9.06-2.68-0.32(2)(3.06÷0.25+2.76)×0
4樓:褲兜最棒
(1)9.06-2.68-0.32,
=9.06-(2.68+0.32),
=9.06-3,
=6.06;
(2)(3.06÷0.25+2.76)×
0.2,
=(12.24+2.76)×0.2,
=15×0.2,
=3;(3)18-(3
5+4÷25),
=18-(0.6+4×52),
=18-(0.6+10),
=18-10.6,
=7.4;
(4)2.7×1.25+5.3×125%,=2.7×1.25+5.3×1.25,
=(2.7+5.3)×1.25,
=8×1.25,
=10.
用遞等式計算,能簡算的要寫出簡算過程. (2.5×6+2.5×4)÷5 35.6-2.8+4.4-7.2 0.25×3.2×12.
5樓:最強黑客
(1)(2.5×6+2.5×4)÷5,
=2.5×(6+4)÷5,
=2.5×10÷5,
=25÷5,
=5;(2)35.6-2.8+4.4-7.2,=(35.6+4.4)-(2.8+7.2),=40-10,
=30;
(3)0.25×3.2×12.5,
=0.25×4×0.8×12.5,
=(0.25×4)×(0.8×12.5),=1×10,
=10;
(4)7.5÷(1.5+2.5),
=7.5÷4,
=1.875;
(5)0.6×(5+0.6)-1,
=0.6×5+0.6×0.6-1,
=3+0.36-1,
=3.36-1,
=2.36;
(6)3.7×1.25-3.7×0.25,=3.7×(1.25-0.25),
=3.7×1,
=3.7.
脫式計算下面各題(能簡算的要用簡便方法計算,並寫出簡算過程). (84×27-2166)÷17 115×3.
6樓:小柒
①(84×27-2166)÷17,
=(2268-2166)÷17,
=102÷17,
=6;②11
5×3.7+5.3÷5
11+2.2,
=2.2×3.7+5.3×2.2+2.2,=2.2×(3.7+5.3+1),
=2.2×10,
=22;
③(0.75÷3-0.1)×(1-23),=(0.25-0.1)×13,
=0.15×13,
=0.05.
脫式計算(能簡便算的要簡算,寫出主要步驟)①3.6-2.8+7.4-7.2 ② 8 17 ÷
7樓:姿態
①3.6-2.8+7.4-7.2
=3.6+7.4-(2.8+7.2)
=11-10
=1;②8
17÷23+1
23 ×
9 17
+123 =8
17×1
23+1
23×9
17+1
23×1
=(8 17
+917
+1)×1
23=2×1
23 =2
23;③(1 2
+1 3
)÷3 5
-1718 =5
6÷3 5
-1718
=2518
-1718 =4
9;④18÷[5 6
+(5 8
-1 3
)]=18÷(5 6
+724
)=18÷27
24=16.
用遞等式計算寫出必要的計算過程,能簡便計算的要簡便計算(1)28×105+7236÷18(2)4.5-3.15+0.5×8(3
8樓:匿名使用者
(1)28×105+7236÷18
=2940+402
=3342
(2)4.5-3.15+0.5×8
=4.5-3.15+4
=5.35
(3)8.5×5.3+3.7×8.5+8.5=8.5×(
5.3+3.7+1)
=8.5×10
=85(4)(0.7+1.7)×15-36=2.4×15-36
=36-36=0
遞等式計算(能簡算的要簡算,並寫出必要的計算過程)3 26 1 4 6 34
1 3.26 1.4 6.34 9.6 3.26 6.34 1.4 9.6 9.6 11 20.6 2 19600 600 5 25 19600 120 25 19600 3000 16600 3 300 3.25 6.75 296.75 6.75 303.5 4 36 19 19 35 684 1...
用遞等式計算能簡算的要簡算
1 5.03 2.5 0.96,2.53 0.96,3.49 2 35.72 5.9 5.72 35.72 5.9 5.72,35.72 5.72 5.9,30 5.9,24.1 3 25 4.7 5.3,20.3 5.3,25.6 4 1.3 2.83 8.7 0.17,1.3 8.7 2.83 ...
用遞等式計算,能簡算的要寫出簡算過程
1 2.5 6 2.5 4 5,2.5 6 4 5,2.5 10 5,25 5,5 2 35.6 2.8 4.4 7.2,35.6 4.4 2.8 7.2 40 10,30 3 0.25 3.2 12.5,0.25 4 0.8 12.5,0.25 4 0.8 12.5 1 10,10 4 7.5 1...