《2025年通城学典计算能手四年级数学下册青岛版》

一、口算
9.2÷2.3= 0.08×0.5= 3.75 + 3.75×9=
2.5×400= 8 - 2.5= 6÷(0.5×4)=
9.6÷32= 3.2×0.4= 12.1 - (2.1 + 7.4)=
1.8×6= 0.18÷0.02= 2.3÷0.2÷5=
2.63 + 0.37= 15×0.06= 1.25×0.3×0.8=
4.3 - 0.25= 8.05 + 1.5= 1÷0.01×3.8=
0.3÷0.15= 4×0.82= 0.5×(0.8 + 1.4)=
2.6 + 0.14= 30.2 - 3.02= (9 - 4.5)÷0.5=
7.34÷2= 6÷1.2= 7.5 - 0.38 - 1.62=
0.23×0.4= 2×0.05= 1÷0.4 - 0.34=

答案： 4 0.04 37.5
1000 5.5 3
0.3 1.28 2.6
10.8 9 2.3
3 0.9 0.3
4.05 9.55 380
2 3.28 1.1
2.74 27.18 9
3.67 5 5.5
0.092 0.1 2.16

二、计算下面各题，怎样简便就怎样计算。
4×(1.2 + 0.65÷1.3) 4.7×4.7 + 4.7 + 4.3×4.7 0.36÷[(6.1 - 4.6)×0.8]

答案： 6.8 47 0.3

一、、解方程。
1.4x = 70 2x÷2.2 = 4.5 2x + 6x = 4.8
(x - 3)÷2 = 7.5 7(x - 1.2) = 2.1 6x - 4.8×0.4 = 5.28
2(x + 1.7) = 9.2 (3.8 - 2)x = 14.4 1.2×0.2x = 0.12
6.2x - x = 416 7 + 2.5 + x = 13.8 16×0.5 + 4x = 56
0.2x - 4.2 = 3.7 4x - x + 3.2 = 20 8x÷7.2 = 0.6

答案： x = 50 x = 4.95
x = 0.6
x = 18 x = 1.5
x = 1.2
x = 2.9 x = 8
x = 0.5
x = 80 x = 4.3
x = 12
x = 39.5 x = 5.6
x = 0.54

二、计算下面各题，怎样简便就怎样计算。
0.6 + 0.84 + 0.4 + 8.16 64×12.5×25 3.2÷0.8×(91.2÷24)
6.6 + 3.63÷0.6 + 19.4 (6.02 + 2.8)÷2 - 2.05 15.4 - (3.68 + 6.4) - 0.32
35.1×0.25 + 35.1×0.75 (70.2÷6.5 + 2.8)×3.5 1.05×(3.8 - 0.8)÷6.3
30×[7.5÷(2.7 - 1.2)] (7.2×2.4 - 9.48)÷0.25 0.36÷(5.3 - 2.9)×1.4
4.16÷4 + 3.84×0.25 95÷[(1 + 0.9)÷0.1] 19×35 + 19×6 + 190×5.9

答案： 10 20000 15.2
32.05 2.36 5
35.1 47.6 0.5
150 31.2 0.21
2 5 1900