1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.
用遞等式計算,能簡算的要簡算.(18%)(1)25×12-850÷17(2)(3.2÷16+10.8)÷22(3)3.2×12.5×2
2樓:匿名使用者
(du1)25×zhi12-850÷
dao17
=25×4×3-50,
=300-50,
=250;
(2)(3.2÷16+10.8)÷22
=(0.2+10.8)÷22,
=11÷22,
=0.5;
(3)3.2×12.5×2.5
=0.8×4×12.5×2.5,
=(12.5×0.8)×(2.5×4),
=10×10,
=100;
(4)7.05-3.84-0.16-1.05=7.05-1.05-(3.84+0.16),=6-4,
=2;(5)8
17×9-8÷17 8
=817
×9-8×8
17,=(9-8)×8
17,=1×8
17,=8
17;(6)5 6
×[2÷(7 8
-3 4
)]=5 6
×[2÷1 8
],=5 6
×16,
=40 3.
脫式計算(能簡算要簡算)?
3樓:妙酒
3.76+4.25+5.75 +12-
3.27-0.73+ 60.
49-36+5.51,『=(4.25+5.
75)+12-(3.27+0.73)-36+(60.
49+5.51)+3.76
=10+12-4-36+66+3.76
=51.76
4樓:老任
解:1 . 3.76+4.25+5.75
=3.76+(4.25+5.75)
=3.76+10
=13.76
2. 12-3.27-0.73
=12-(3.27+0.73)
=12-4
=83. 60.49-36+5.51
=(60.49+5.51)-36
=66-36=30
5樓:原宇衛香旋
(54+9/13)÷9
36÷【
(5/6-1/3)×3】
5/7+8/7÷2
2-6/13÷9/2-2/3
=(54+9/13)×1/9
=36÷2/3
=5/7+4/7
=2-4/39-2/3
=54×1/9+9/13×1/9
=54=9/7
=2-(4/39+2/3)
=6+1/13
=48/39=16/13
=79/13或6
1/13
【3/5-(2/4-2/5)】÷4
=【3/5-1/10】÷4
=1/2÷4
=1/8
希望我答
幫助純手打辛苦~
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/
6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.
7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
8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
12.25-1.25x3.2十0.8脫式計算,能簡算的要簡算,怎麼算?
9樓:匿名使用者
通過觀察,能簡算的是:
1.25*3.2
=1.25*8*0.4
=10*0.4
=4所以,原式:
12.25-4+0.8
=8.25+0.75+0.05
=9+0.05
=9.05
請採納謝謝
10樓:匿名使用者
12.25-1.25×
dao3.2+0.8
=12.25-1.25×(
回0.8×4)
答+0.8
=12.25-(1.25×0.8)×4+0.8=12.25-1×4+0.8
=12.25-4+0.8
=8.25+0.8
=9.05
脫式計算能用簡便計算的要簡算.(1)310+4.25+3.7+134(2)0.125×3.2×25(3)17×44+54×17(4)7.8÷
11樓:手機使用者
(1)3
10+4.25+3.7+134=3
10+3.7+4.25+13
4=(3
10+3.7)+(4.25+134)
=4+6
=10;
(2)0.125×3.2×25
=0.125×8×0.4×25
=(0.125×8)×版(權0.4×25)=1×10
=10;
(3)1
7×44+54×17=1
7×(44+54)=17
×98=14;
(4)7.8÷〔32×(1-5
8)+3.6〕
=7.8÷〔32×3
8+3.6〕
=7.8÷〔12+3.6〕
=7.8÷15.6
=0.5;
(5)5
6÷〔3
4×(79-1
3)〕=56
÷〔34×49
〕=56÷1
3=2.5.
脫式計算(能簡算的要簡算
12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.
脫式計算能簡算的要簡算,脫式計算能簡算的要簡算
1 3.4 1.2 0.5 5 3.4 1.2 5 0.5 5 3.4 6 2.5 3.4 8.5,0.4 2 1.9 19.9 199.9 0.3,1.9 19.9 199.9 0.1 0.1 0.1 1.9 0.1 19.9 0.1 199.9 0.1 2 20 200,222 脫式計算 能簡算...
脫式計算,能簡算要簡算
1 33.5 5.3 4.7 16.5,33.5 16.5 5.3 4.7 50 10,40 2 9900 25 4,9900 25 4 9900 100,99 3 1 3 5 310 1 9 10,10 9 4 24 2 3 1 6 3 8 24 2 3 24 1 6 24 3 8 16 4 9,...
脫式計算,能簡算的要簡算
0.26 2.5 0.74 2.5 2.5,0.26 0.74 1 2.5,2 2.5,5 18.09 7.5 0.14 1.06 18.09 7.5 1.2,18.09 9,9.09 9 38.02 1.98 0.5 9 40 0.5 9 20,0.45 脫式計算,能簡算的用簡算 5.5 17.3...