www.1862.net > 136×27加27×31加27×34怎样简便计算

136×27加27×31加27×34怎样简便计算

136×27加27×31加27×34 =27×(136+31+34) =27×(200+1) =27×200+27 =5400+27 =5427

136×27-65×27+27×29 =(136-65+29)x27 =100x27 =2700

136x58+43x136-136x1 =136x(58+43-136)

运算定律与简便计算 (一)加减法运算定律 1.加法交换律 定义:两个加数交换位置,和不变 例如:16+23=23+16 546+78=78+546 2.加法结合律 定义:先把前两个数相加,或者先把后两个数相加,和不变。 注意:加法结合律有着广泛的应用,如果其中有...

1. 3/7 × 49/9 - 4/3 2. 8/9 × 15/36 + 1/27 3. 12× 5/6 – 2/9 ×3 4. 8× 5/4 + 1/4 5. 6÷ 3/8 – 3/8 ÷6 6. 4/7 × 5/9 + 3/7 × 5/9 7. 5/2 -( 3/2 + 4/5 ) 8. 7/8 + ( 1/8 + 1/9 ) 9. 9 × 5/6 + 5/6 10. 3/4 × 8/9 - 1/3 11. 7 × 5/49 + 3/14...

408-12×24 = 408 - 288 = 120 (46+28)×60 = 74 x 60 = 4440 42×50-17 = 2100- 17 = 2083 32+105÷5 = 32 + 21 = 53 420×(327-238) = 420 x 89 = 37380 (4121+2389)÷7 = 6510 ÷7 = 930 3.416÷(0.016×35) = 3.416 ÷0.56 = 6.1 0.8×[(10...

简便计算. 216+305 25×32 47+236+64 6×(15×9) 402+359 43+78+122+257 25×(26×4) 25×44 354+(229+46) (1)9.26-4.38-2.62 (2)9.26-(4.38+2.26) (3)9.26-(4.38-2.74 (1)4.75-9.64+8.25-1.36 (2)14.529+(2.471-3) (3)38.68-(4.7-2.32) 415-176-24 8....

应该是可以计算出来的!

136+136×99 =136×(1+99) =136×100 =13600

(1)756-3910+216-2.1=(756+216)-(3910+2.1)=10-6=4;(2)(23+16?34)÷136=23×36+16×36-34×36=24+6-27=3;(3)12×3.2+5.6×0.5+1.2×50%=12×(3.2+5.6+1.2)=12×10=5;(4)[53?(25+34)]÷314=[53-2320)]÷314=3160÷314=115.

网站地图

All rights reserved Powered by www.1862.net

copyright ©right 2010-2021。
www.1862.net内容来自网络,如有侵犯请联系客服。zhit325@qq.com