1. 看图列式。(先涂色,再列式计算)

(
(
(
$\frac{1}{4}$
) + ($\frac{1}{4}$
) + ($\frac{1}{4}$
) = ($\frac{3}{4}$
)(
$\frac{1}{4}$
) × (3
) = ($\frac{3}{4}$
)答案
1.
$\frac{1}{4}$ × 3 = $\frac{3}{4}$
2. 想一想,算一算。
(1) $\frac{2}{9} × 4 = \frac{2}{9} + \frac{(\quad)}{(\quad)} + \frac{(\quad)}{(\quad)} + \frac{(\quad)}{(\quad)} = \frac{2 + (\quad) + (\quad) + (\quad)}{9} = \frac{2 × (\quad)}{9} = \frac{(\quad)}{(\quad)}$
(2) $\frac{1}{8} × 5 = \frac{(\quad) × (\quad)}{8} = \frac{(\quad)}{(\quad)}$
(3) $\frac{5}{7} × 3 = \frac{(\quad) × (\quad)}{(\quad)} = \frac{(\quad)}{(\quad)}$
(1) $\frac{2}{9} × 4 = \frac{2}{9} + \frac{(\quad)}{(\quad)} + \frac{(\quad)}{(\quad)} + \frac{(\quad)}{(\quad)} = \frac{2 + (\quad) + (\quad) + (\quad)}{9} = \frac{2 × (\quad)}{9} = \frac{(\quad)}{(\quad)}$
(2) $\frac{1}{8} × 5 = \frac{(\quad) × (\quad)}{8} = \frac{(\quad)}{(\quad)}$
(3) $\frac{5}{7} × 3 = \frac{(\quad) × (\quad)}{(\quad)} = \frac{(\quad)}{(\quad)}$
答案
(1) $\frac{2}{9}$ $\frac{2}{9}$ $\frac{2}{9}$ 2 2 2 4 $\frac{8}{9}$
(2)1 5 $\frac{5}{8}$
(3)$\frac{5×3}{7}$ $\frac{15}{7}$
(2)1 5 $\frac{5}{8}$
(3)$\frac{5×3}{7}$ $\frac{15}{7}$
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