1.
涂色部分的长是(
0.6
)米,宽是(0.4
)米,面积是(24
)个小格,每个小格是(0.01
)平方米,所以涂色部分的面积是(0.24
)平方米,列出的算式为(0.6
)×(0.4
)=(0.24
)(平方米)。答案
1. 0.6 0.4 24 0.01 0.24 0.6×0.4=0.24
2. 想一想,算一算,填一填
0.7 × 5.8 = ()
↓ × () ↓ × () ↑ ÷ ()
7 × 58 = ()
3.6 × 0.04 = ()
↓ × () ↓ × () ↑ ÷ ()
36 × 4 = ()
12.5 × () = 40
↓ × () ↓ × () ↑ ÷ ()
125 × 32 = 4000
() × () = 40
↓ × () ↓ × () ↑ ÷ ()
125 × 32 = 4000
0.7 × 5.8 = ()
↓ × () ↓ × () ↑ ÷ ()
7 × 58 = ()
3.6 × 0.04 = ()
↓ × () ↓ × () ↑ ÷ ()
36 × 4 = ()
12.5 × () = 40
↓ × () ↓ × () ↑ ÷ ()
125 × 32 = 4000
() × () = 40
↓ × () ↓ × () ↑ ÷ ()
125 × 32 = 4000
答案
0.7 × 5.8 = (4.06)
↓ × (10) ↓ × (10) ↑ ÷ (100)
7 × 58 = (406)
3.6 × 0.04 = (0.144)
↓ × (10) ↓ × (100) ↑ ÷ (1000)
36 × 4 = (144)
12.5 × (3.2) = 40
↓ × (10) ↓ × (10) ↑ ÷ (100)
125 × 32 = 4000
(1.25) × (32) = 40
↓ × (100) ↓ × (1) ↑ ÷ (100)
125 × 32 = 4000
↓ × (10) ↓ × (10) ↑ ÷ (100)
7 × 58 = (406)
3.6 × 0.04 = (0.144)
↓ × (10) ↓ × (100) ↑ ÷ (1000)
36 × 4 = (144)
12.5 × (3.2) = 40
↓ × (10) ↓ × (10) ↑ ÷ (100)
125 × 32 = 4000
(1.25) × (32) = 40
↓ × (100) ↓ × (1) ↑ ÷ (100)
125 × 32 = 4000
3. 根据$34×26=884$,在括号里填上适当的数
$34×2.6=( \quad )$
$0.34×26=( \quad )$
$340×2.6=( \quad )$
$0.34×2.6=( \quad )$
$3.4×( \quad )=0.884$
$( \quad )×0.26=8.84$
$34×2.6=( \quad )$
$0.34×26=( \quad )$
$340×2.6=( \quad )$
$0.34×2.6=( \quad )$
$3.4×( \quad )=0.884$
$( \quad )×0.26=8.84$
答案
3. 88.4 8.84 884 0.884 0.26 34
4. 淘气在做一道乘法算式时,把其中的一个乘数7.2看成了72,算得的积为57.6。正确的积是多少?请写出思考过程。
答案
4. 5.76
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