1. subtracting numbers without regrouping

10 years ago 30748 Views

5. multiplying 2 to 4 digit numbers by 1-to 2-digit

10 years ago 6877 Views

Tag question rules

10 years ago 2630 Views

2. estimating differences

10 years ago 2440 Views

4. solving word problems mentally

10 years ago 2208 Views