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
69 + 20 = ______
77 + 20 = ______
5 × 10 = ______
51 + 10 = ______
1 × 10 = ______
89 − 10 = ______
62 − 10 = ______
28 − 10 = ______
9 × 10 = ______
70 + 20 = ______
7 × 10 = ______
60 + 20 = ______
47 + 20 = ______
45 − 10 = ______
55 − 10 = ______
81 + 20 = ______
98 − 10 = ______
39 − 10 = ______
32 − 10 = ______
34 + 20 = ______
