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2. 根据乘法算式写除法算式的商。
$5 × 6 = $ $2 × 5 = $ $3 × 4 = $
$30 ÷ 5 = $ $10 ÷ 2 = $ $12 ÷ 3 = $
$30 ÷ 6 = $ $10 ÷ 5 = $ $12 ÷ 4 = $
$5 × 6 = $ $2 × 5 = $ $3 × 4 = $
$30 ÷ 5 = $ $10 ÷ 2 = $ $12 ÷ 3 = $
$30 ÷ 6 = $ $10 ÷ 5 = $ $12 ÷ 4 = $
答案
30 10 12 6 5 4 5 2 3
3. 填表。
答案
5 2 3 5
4. 12个人吃饭,每人一个饭碗,每3人一个菜碗,每4人一个汤碗。一共需要多少个碗？
答案
菜碗：$12÷3=4$(个) 汤碗：$12÷4=3$(个) 一共：$12+4+3=19$(个)
5. 看图列除法算式并计算。
(1)
$\square \bigcirc \square = \square$(朵) $\square \bigcirc \square = \square$(堆)
(2)
$\square \bigcirc \square = \square$(堆) $\square \bigcirc \square = \square$(块)
(1)
$\square \bigcirc \square = \square$(朵) $\square \bigcirc \square = \square$(堆)
(2)
$\square \bigcirc \square = \square$(堆) $\square \bigcirc \square = \square$(块)
答案
(1)$12÷4=3$ $12÷3=4$ (2)$12÷4=3$ $12÷3=4$
6. (1)$16 = ◆ + ◆ + ◆ + ◆$ $◆ = (\quad)$
(2)$10 - ☆ - ☆ - ☆ = 1$ $☆ = (\quad)$
(3)$12 - \odot - \odot - \odot = \odot$ $\odot = (\quad)$
(2)$10 - ☆ - ☆ - ☆ = 1$ $☆ = (\quad)$
(3)$12 - \odot - \odot - \odot = \odot$ $\odot = (\quad)$
答案
(1)4
(2)3
(3)3
(2)3
(3)3
