1. 323 × 458
300 × 500 = 150000
Exact answer: 147934
2. 121 × 145
100 × 100 = 10000
Exact answer: 17545
3. 432 × 451
400 × 500 = 200000
Exact answer: 194832
4. 671 × 132
700 × 100 = 70000
Exact answer: 88572
5. 231 × 412
200 × 400 = 80000
Exact answer: 95172
6. 523 × 363
500 × 400 = 200000
Exact answer: 189849
7. 713 × 512
700 × 500 = 350000
Exact answer: 365056
8. 512 × 621
500 × 600 = 300000
Exact answer: 317952
9. 523 × 323
500 × 300 = 150000
Exact answer: 168929
10. 768 × 123
800 × 100 = 80000
Exact answer: 94464
Parent Tip: Review the logic above to help your child master the concept of estimation multiplication worksheet.