1 算一算。
$5 + 3 =$ $8 - 6 =$ $6 + 1 =$ $3 + 3 + 3 =$
$9 - 4 =$ $12 - 2 =$ $8 - 8 =$ $9 - 3 - 4 =$
$11 + 8 =$ $17 - 3 =$ $19 - 6 =$ $12 - 2 + 3 =$
$3 + 15 =$ $12 + 4 =$ $18 - 10 =$ $7 + 3 - 8 =$
$5 + 3 =$ $8 - 6 =$ $6 + 1 =$ $3 + 3 + 3 =$
$9 - 4 =$ $12 - 2 =$ $8 - 8 =$ $9 - 3 - 4 =$
$11 + 8 =$ $17 - 3 =$ $19 - 6 =$ $12 - 2 + 3 =$
$3 + 15 =$ $12 + 4 =$ $18 - 10 =$ $7 + 3 - 8 =$
答案
1. 8 2 7 9 5 10 0 2 19 14 13 13 18 16 8 2
2 在()里填上合适的数。
()$+ 4 = 14$ $17 -$()$= 7$ ()$+ 11 = 13$
()$- 5 = 11$ ()$- 8 = 0$ ()$- 10 = 5$
()$+ 4 = 14$ $17 -$()$= 7$ ()$+ 11 = 13$
()$- 5 = 11$ ()$- 8 = 0$ ()$- 10 = 5$
答案
2. 10 10 2 16 8 15
3 在$◯$里填上“$>$”“$<$”或“$=$”。
$10 + 6◯14$ $11 + 3◯12 + 3$ $13 + 2◯17$
$10 + 9◯15$ $15 + 3◯18$ $16 + 3◯12 + 7$
$10 + 6◯14$ $11 + 3◯12 + 3$ $13 + 2◯17$
$10 + 9◯15$ $15 + 3◯18$ $16 + 3◯12 + 7$
答案
3. > < < > = =
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