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1. 直接写出得数。
$3×5 = $
$1×1 = $
$5×8 = $
$8×6 = $
$3×5 = $
15
$9×2 = $18
$7×4 = $28
$6×6 = $36
$1×1 = $
1
$5×6 = $30
$6×9 = $54
$7×8 = $56
$5×8 = $
40
$3×7 = $21
$5×9 = $45
$4×6 = $24
$8×6 = $
48
$7×7 = $49
$8×3 = $24
$9×9 = $81
答案：
15
18
28
36
1
30
54
56
40
21
45
24
48
49
24
81
18
28
36
1
30
54
56
40
21
45
24
48
49
24
81
2. 计算。
$4×3 + 2 = $
$3×5 + 3 = $
$4×3 + 2 = $
14
$5×7 + 6 = $41
$9×6 - 5 = $49
$3×5 + 3 = $
18
$6×4 - 6 = $18
$8×8 + 8 = $72
答案：
$4×3 + 2 = 12 + 2 = 14$
$5×7 + 6 = 35 + 6 = 41$
$9×6 - 5 = 54 - 5 = 49$
$3×5 + 3 = 15 + 3 = 18$
$6×4 - 6 = 24 - 6 = 18$
$8×8 + 8 = 64 + 8 = 72$
$5×7 + 6 = 35 + 6 = 41$
$9×6 - 5 = 54 - 5 = 49$
$3×5 + 3 = 15 + 3 = 18$
$6×4 - 6 = 24 - 6 = 18$
$8×8 + 8 = 64 + 8 = 72$
答案：
1. 画一画,填一填。
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答案：
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2. 用不同的方法圈出“$3×5$”表示的意义。
答案：
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