五年级下册数学简便计算题100道要有答案

2024-11-07 02:04:43
推荐回答(5个)
回答1:

一、口算下面各题

10-2.65= 0.9×0.08= 528-349= 6+14.4= 24÷0.04= 

12.34-2.3= 0÷3.8= 0.77+0.33= 7÷1.4= 67.5+0.25=7.2÷8×4= 5-1.4-1.6= 

00÷125÷8= 1.9×4×0.5=

80×0.125= 3× = 6 6= 2 -( + )= 10 2= 

3.2×7÷3.2×7= ( - )×12= 187.7×11-187.7= 1- 62.5%= 

二、写出下列每题在简便运算时所运用的定律或性质

4 +3.2+5 +6.8 25×(8×0.4)×1.25 7 -(2 - ) 

( ) ( ) ( ) 

( + + )×72 93.5÷3 16÷2.5 

( ) ( ) ( )

720÷16÷5 630÷42 456-(256-36)

102×35 98×42 158+262+138 375+219+381+225

5001-247-1021-232 (181+2564)+2719 378+44+114+242+222

276+228+353+219 (375+1034)+(966+125) (2130+783+270)+1017

99+999+9999+99999 7755-(2187+755) 2214+638+286

3065-738-1065 899+344 2357-183-317-357

2365-1086-214 497-299 2370+1995

回答2:

6.7*101
=6.7*(100+1)
=6.7*100+6.7*1
=670+6.7
=676.7

回答3:

5.4除于1.8加240乘1.5
等于3加240乘1.5
等于3加360
等于363

回答4:

56.8+43.2=100

回答5:

x/2+x/3+x/4=65
(6x+4x+3x)/12=65
13x/12=65
x=65x12/13
=60