1. “9 + 1 = 10,10 + 5 = 15”,用来想算式(
①9 + 6 ②8 + 7 ③10 + 5
①
)的得数很方便。①9 + 6 ②8 + 7 ③10 + 5
答案:
①
2. 与7 + 5得数不一样的算式是(
①7 + 3 + 2 ②6 + 6 ③5 + 6
③
)。①7 + 3 + 2 ②6 + 6 ③5 + 6
答案:
③
3. 不计算,根据8 + 7 = 15,可以快速判断算式(
①6 + 7 ②8 + 4 ③8 + 8
③
)的得数大于15。①6 + 7 ②8 + 4 ③8 + 8
答案:
③
4. 跷跷板右边可以放的算式是(

①8 + 7 ②7 + 7 ③6 + 7
③
)。①8 + 7 ②7 + 7 ③6 + 7
答案:
③
1. 直接写得数。(12颗☆)
$3 + 8 = $
$9 + 2 = $
$7 + 4 = $
$3 + 8 = $
11
$9 + 5 = $14
$5 + 7 = $12
$4 + 5 + 7 = $16
$9 + 2 = $
11
$8 + 6 = $14
$10 + 4 = $14
$7 - 2 + 8 = $13
$7 + 4 = $
11
$5 + 9 = $14
$0 + 9 = $9
$9 - 4 + 6 = $11
答案:
11 14 12 16 11 14 14 13 11 14 9 11
2. 装苹果。(连一连)(12颗☆)

答案:
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