2025年学霸的暑假计算暑期大通关四升五数学第50页答案
1. 直接写出得数。(20☆)
$12.3 - 0.5 = $
11.8

$51.3÷0.3 = $
171

$7.8÷2.6 = $
3

$22.6×0.4 = $
9.04

$12.6÷0.6 = $
21

$12.6÷0.3 = $
42

$10.5×0.5 = $
5.25

$12.5÷0.5 = $
25

$0.2×0.8 = $
0.16

$58.6÷0.2 = $
293

$0.4×0.16 = $
0.064

$22.6×4 = $
90.4

$0.6÷0.3 = $
2

$24.3÷0.3 = $
81

$44.5÷0.5 = $
89

$0.12×0.8 = $
0.096

$4.5÷0.5 = $
9

$56.3 + 11.2 = $
67.5

$49 - 44.5 = $
4.5

$22.6÷0.2 = $
113

$14.7÷0.7 = $
21

$36.9÷0.9 = $
41

$5.4÷1.8 = $
3

$1.5×0.7 = $
1.05

$0.7×0.8 = $
0.56

$72.3×0.8 = $
57.84

$51.3×0.8 = $
41.04

$0.9÷0.9 = $
1

$1.2×0.7 = $
0.84

$7.6×0.8 = $
6.08

$15.5÷0.5 = $
31

$3×0.8 = $
2.4

$5.6÷0.7 = $
8

$7.2÷0.4 = $
18

$72.8÷0.8 = $
91

$2.3÷0.23 = $
10

$52.2 - 0.76 = $
51.44

$51.2÷0.4 = $
128

$0.56÷0.7 = $
0.8

$99.9÷0.9 = $
111

答案

11.8 171 3 9.04 21 42 5.25 25 0.16 293 0.064 90.4 2 81 89 0.096 9 67.5 4.5 113 21 41 3 1.05 0.56 57.84 41.04 1 0.84 6.08 31 2.4 8 18 91 10 51.44 128 0.8 111
2. 后面括号中哪个 x 的值是方程的解？请画“√”。(12☆)
(1)$x - 0.9 = 4.9(x = 4\quad x = 5.8$
√
)
(2)$4x = 8.8(x = 2.2$
√
$\quad x = 35.2)$
(3)$16.7 - x = 4.7(x = 12$
√
$\quad x = 21.4)$
(4)$x÷6 = 7.8(x = 1.3\quad x = 46.8$
√
)
(5)$x + 3.6 = 7.2(x = 3.6$
√
$\quad x = 10.8)$
(6)$6.25÷x = 5(x = 1.25$
√
$\quad x = 31.25)$

答案

(1)$x=5.8$ √ (2)$x=2.2$ √ (3)$x=12$ √ (4)$x=46.8$ √ (5)$x=3.6$ √ (6)$x=1.25$ √
3. 解方程。(18☆)
$3.96÷x = 3.3$
$x=1.2$

$161÷x = 3.5$
$x=46$

$62.5 - x = 45$
$x=17.5$

$x + 2.7 = 12.5$
$x=9.8$

$3x + 2.5x = 55$
$x=10$

$1.8x = 1.44$
$x=0.8$

答案

$x=1.2$ $x=46$ $x=17.5$ $x=9.8$ $x=10$ $x=0.8$