$0.5×0.4×0.2=
$1.2×6 + 3.8=
$0.8×(0.1 + 0.4)=
$(0.11 - 0.11)×9.7=
$0.4×0.6×0.5=
$1.5×0.2×0.3=
$0.5×0.8 + 1.6=
$1.8×5 + 9=
$1.5 - 7.5×0.2=
$3.2×0.1×0.3=
$2.1×3 - 6.2=
$2.5×(0.32 + 0.68)=
$10×0.99 + 0.1=
$3.7×(3.7 - 3.7)=
$0.05×20 - 1=
$7.5×2×0.5=
$4.5×0.2×0.4=
$1.7×0.1×0.3=
$2.5×4×0.1=
$0.8×0.5×0.2=
0.04
$$1.2×6 + 3.8=
11
$$0.8×(0.1 + 0.4)=
0.4
$$(0.11 - 0.11)×9.7=
0
$$0.4×0.6×0.5=
0.12
$$1.5×0.2×0.3=
0.09
$$0.5×0.8 + 1.6=
2
$$1.8×5 + 9=
18
$$1.5 - 7.5×0.2=
0
$$3.2×0.1×0.3=
0.096
$$2.1×3 - 6.2=
0.1
$$2.5×(0.32 + 0.68)=
2.5
$$10×0.99 + 0.1=
10
$$3.7×(3.7 - 3.7)=
0
$$0.05×20 - 1=
0
$$7.5×2×0.5=
7.5
$$4.5×0.2×0.4=
0.36
$$1.7×0.1×0.3=
0.051
$$2.5×4×0.1=
1
$$0.8×0.5×0.2=
0.08
$
答案:
解析:
这些题目主要考查了小数的基本运算,包括乘法、加法和减法,以及运算的优先级。
答案:
$0.5 × 0.4 × 0.2 = 0.04$
$1.2 × 6 + 3.8 = 7.2 + 3.8 = 11$
$0.8 × (0.1 + 0.4) = 0.8 × 0.5 = 0.4$
$(0.11 - 0.11) × 9.7 = 0 × 9.7 = 0$
$0.4 × 0.6 × 0.5 = 0.24 × 0.5 = 0.12$
$1.5 × 0.2 × 0.3 = 0.3 × 0.3 = 0.09$
$0.5 × 0.8 + 1.6 = 0.4 + 1.6 = 2$
$1.8 × 5 + 9 = 9 + 9 = 18$
$1.5 - 7.5 × 0.2 = 1.5 - 1.5 = 0$
$3.2 × 0.1 × 0.3 = 0.32 × 0.3 = 0.096$
$2.1 × 3 - 6.2 = 6.3 - 6.2 = 0.1$
$2.5 × (0.32 + 0.68) = 2.5 × 1 = 2.5$
$10 × 0.99 + 0.1 = 9.9 + 0.1 = 10$
$3.7 × (3.7 - 3.7) = 3.7 × 0 = 0$
$0.05 × 20 - 1 = 1 - 1 = 0$
$7.5 × 2 × 0.5 = 15 × 0.5 = 7.5$
$4.5 × 0.2 × 0.4 = 0.9 × 0.4 = 0.36$
$1.7 × 0.1 × 0.3 = 0.17 × 0.3 = 0.051$
$2.5 × 4 × 0.1 = 10 × 0.1 = 1$
$0.8 × 0.5 × 0.2 = 0.4 × 0.2 = 0.08$
这些题目主要考查了小数的基本运算,包括乘法、加法和减法,以及运算的优先级。
答案:
$0.5 × 0.4 × 0.2 = 0.04$
$1.2 × 6 + 3.8 = 7.2 + 3.8 = 11$
$0.8 × (0.1 + 0.4) = 0.8 × 0.5 = 0.4$
$(0.11 - 0.11) × 9.7 = 0 × 9.7 = 0$
$0.4 × 0.6 × 0.5 = 0.24 × 0.5 = 0.12$
$1.5 × 0.2 × 0.3 = 0.3 × 0.3 = 0.09$
$0.5 × 0.8 + 1.6 = 0.4 + 1.6 = 2$
$1.8 × 5 + 9 = 9 + 9 = 18$
$1.5 - 7.5 × 0.2 = 1.5 - 1.5 = 0$
$3.2 × 0.1 × 0.3 = 0.32 × 0.3 = 0.096$
$2.1 × 3 - 6.2 = 6.3 - 6.2 = 0.1$
$2.5 × (0.32 + 0.68) = 2.5 × 1 = 2.5$
$10 × 0.99 + 0.1 = 9.9 + 0.1 = 10$
$3.7 × (3.7 - 3.7) = 3.7 × 0 = 0$
$0.05 × 20 - 1 = 1 - 1 = 0$
$7.5 × 2 × 0.5 = 15 × 0.5 = 7.5$
$4.5 × 0.2 × 0.4 = 0.9 × 0.4 = 0.36$
$1.7 × 0.1 × 0.3 = 0.17 × 0.3 = 0.051$
$2.5 × 4 × 0.1 = 10 × 0.1 = 1$
$0.8 × 0.5 × 0.2 = 0.4 × 0.2 = 0.08$
填空
| 因数 | | 25 | 2.5 | 2.5 | 2.5 |
| :--- | :--- | :--- | :--- | :--- | :--- |
| 因数 | 4 | | | 4 | 8 |
| 积 | 100 | 200 | 5 | | |
| 加数 | 3.5 | | | 12.75 | 4.23 |
| :--- | :--- | :--- | :--- | :---- | :--- |
| 加数 | | 0.16 | 0.75 | | |
| 和 | 10 | 2 | 1 | 20 | 10 |
| 因数 | | 25 | 2.5 | 2.5 | 2.5 |
| :--- | :--- | :--- | :--- | :--- | :--- |
| 因数 | 4 | | | 4 | 8 |
| 积 | 100 | 200 | 5 | | |
| 加数 | 3.5 | | | 12.75 | 4.23 |
| :--- | :--- | :--- | :--- | :---- | :--- |
| 加数 | | 0.16 | 0.75 | | |
| 和 | 10 | 2 | 1 | 20 | 10 |
答案:
| 因数 | 25 | 25 | 2 | 2.5 | 2.5 |
| :--- | :--- | :--- | :--- | :--- | :--- |
| 因数 | 4 | 8 | 2.5 | 4 | 8 |
| 积 | 100 | 200 | 5 | 10 | 20 |
| 加数 | 3.5 | 1.84 | 0.25 | 12.75 | 4.23 |
| :--- | :--- | :--- | :--- | :---- | :--- |
| 加数 | 6.5 | 0.16 | 0.75 | 7.25 | 5.77 |
| 和 | 10 | 2 | 1 | 20 | 10 |
| :--- | :--- | :--- | :--- | :--- | :--- |
| 因数 | 4 | 8 | 2.5 | 4 | 8 |
| 积 | 100 | 200 | 5 | 10 | 20 |
| 加数 | 3.5 | 1.84 | 0.25 | 12.75 | 4.23 |
| :--- | :--- | :--- | :--- | :---- | :--- |
| 加数 | 6.5 | 0.16 | 0.75 | 7.25 | 5.77 |
| 和 | 10 | 2 | 1 | 20 | 10 |
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