5x4×12=22.5
5.12x4.5的简便方法怎么算 -
方法2:5.12 x 4.5 = 5.12 X (9 ÷ 2) = (5.12÷2) X 9 = 2.56 X 9 = 2.56 X (10-1) = 2.56 X 10 - 2.56 方法3:5.12 x 4.5 = (5+0.12)X4.5 = 5X4.5 + 0.12X4.5 = (25 - 2.5) + 12 X 9 / 200 = 22.5 + 0.54 方法4:5.12 x 4是什么。.
方法2:5.12 x 4.5 = 5.12 X (9 ÷ 2) = (5.12÷2) X 9 = 2.56 X 9 = 2.56 X (10-1) = 2.56 X 10 - 2.56 方法3:5.12 x 4.5 = (5+0.12)X4.5 = 5X4.5 + 0.12X4.5 = (25 - 2.5) + 12 X 9 / 200 = 22.5 + 0.54 方法4:5.12 x 4后面会介绍。.
方法2:5.12 x 4.5 = 5.12 X (9 ÷ 2) = (5.12÷2) X 9 = 2.56 X 9 = 2.56 X (10-1) = 2.56 X 10 - 2.56 方法3:5.12 x 4.5 = (5+0.12)X4.5 = 5X4.5 + 0.12X4.5 = (25 - 2.5) + 12 X 9 / 200 = 22.5 + 0.54 方法4:5.12 x 4是什么。.
方法2:5.12 x 4.5 = 5.12 X (9 ÷ 2) = (5.12÷2) X 9 = 2.56 X 9 = 2.56 X (10-1) = 2.56 X 10 - 2.56 方法3:5.12 x 4.5 = (5+0.12)X4.5 = 5X4.5 + 0.12X4.5 = (25 - 2.5) + 12 X 9 / 200 = 22.5 + 0.54 方法4:5.12 x 4后面会介绍。.
解,设小宇,小业,小鹏分别为3x,4x,5x分。则,3x+4x+5x=90*3 则,x=22.5 则小宇,22.5x3=67.5(分)小业,22.5x4=90(分)小鹏,22.5x5=112.5(分)
=4×8×22.5×12.5 =4×22.5×(8×12.5)=90×100 =9000
怎样计算小数乘法 -
6 26×1.8+26×8.2 =260 175÷16÷12.5= 0.875 29.4÷(14×0.2)= 10.5 1.25×8 =10 3.52÷6.4÷0.5= 1.1小数简便运算(乘法) 小数简便运算(乘法) (1)2.64×1.7-2.64×0.7 =2.64×(1.7-0.7) =2.64×1 =2.64 (2)31.5×1.07-是什么。
多行了 12 4=48千米。此后 甲车返回行了36千米遇到乙车,说明在这相同的时间里,乙车只走了12千米。根据路程除以速度等于时间,可以列出方程。 解:设甲车的速度是每小时x 千米,则甲车的速度是x+12千米。12/ x =36/ (x +12)解出x =6 则x +12=18 到此结束了?。
1.5,3,7.5,22.5,(),():括号里应该填什么数字啊?为什么? -
78.75,315 1.5x2=3,3x2.5=7.5,7.5x3=22.5,22.5x3.5=78.75,78.75x4=315 20 5=(8+12)/4 8=(12+20)/4 12=(20+28)/4
50道五年级脱式计算题带过程和答案,有答案和过程的加分,谢谢了。50道五年级脱式计算题带过程和答案,有答案和过程的加分,谢谢了。408-12×24 = 408 - 288 = 120 (46+28)×60 = 74 x 60 = 4440 42×50-17
22.5x8.2一20.5X4.5一20.5X3.7解便怎么算 -
22.5×8.2-20.5×4.5-20.5×3.7 =22.5×8.2-(20.5×4.5+20.5×3.7)22.5×8.2-20.5×(4.5+3.7)22.5×8.2-20.5×8.2 =(22.5-20.5)×8.2 =2×8.2 =16.4
=42.3×(4x0.4x7.5-1.25x4x0.4) =42.3×[4×0.4×(7.5-1.25)] =42.3×[4×0.4×6.25] =42.3×(4×2.5) =4237 1.8+18÷1.5-0.5×0.3 =1.8+12-0.15 =13.8-0.15 =13.65 6.5×8+3.5×8-47 =52+28-47 =80-47 (80-9.8)×5分之2-1.32 =70.2X2/5-1.32 =28.08-1.32 =26.76 8×7分之4÷[好了吧!