Add or subtract. Then check the answer.
1 7. $5.06 8. 2413 9. $8.17 10. $6.22 11. 8251
4.91 5062 .62 3.56 543
- $8.88
$7.37
- $8.88
$75.59
$13.25
6359
1144
7411
1505
6040
122
6036
$42.01
10.25
$44.52
252
314
321
$11.46
3.21
$24.30
$38.46
$16.25
6975
733
9388
8072
$7.95
$2.62
$.99
$.36
- A scientist discovered 147
fossilized dinosaur eggs in
May. From June to December
he found 542 more dinosaur
eggs. Did he discover at least
600 dinosaur eggs?
26. Trevor bought a fossil shell for
$2.30, a fossil field guide for
$4.15, and a package of
stones for $1.42. He said that
he spent $7.75. Was Trevor
correct? How do you know?
Add or subtract mentally. Look for patterns.
27.
- 1042
515
1042
414
1042
313
1042
212
1042
111
8912
301
8912
401
8912
501
8912
601
8912
701
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