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 − 10 = ______
49 − 10 = ______
1 × 10 = ______
86 + 20 = ______
7 × 10 = ______
5 × 10 = ______
20 + 20 = ______
59 − 10 = ______
30 − 10 = ______
78 + 10 = ______
12 + 10 = ______
61 − 10 = ______
23 + 10 = ______
66 + 10 = ______
99 − 10 = ______
24 + 10 = ______
60 − 10 = ______
6 × 10 = ______
59 + 20 = ______
69 − 10 = ______
