Matemáticas mentales Worksheet
Recommended for 1er grado — 5to grado
Matemáticas mentales Worksheet
Name: ____________________Date: ____________
Instructions: Usar estrategias mentales como sumar diez, duplicar y compensar para calcular rápidamente.
20 problems
21 + 20 = ______
26 − 10 = ______
67 − 10 = ______
40 − 10 = ______
5 × 10 = ______
59 + 10 = ______
31 + 20 = ______
56 + 20 = ______
2 × 10 = ______
32 + 20 = ______
63 − 10 = ______
29 + 20 = ______
7 × 10 = ______
20 + 10 = ______
83 + 10 = ______
3 × 10 = ______
23 + 20 = ______
36 − 10 = ______
42 + 20 = ______
66 − 10 = ______
