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
99 − 10 = ______
31 + 10 = ______
79 + 20 = ______
26 + 20 = ______
69 + 10 = ______
9 × 10 = ______
47 + 20 = ______
42 + 10 = ______
1 × 10 = ______
25 − 10 = ______
28 + 20 = ______
83 + 20 = ______
19 + 10 = ______
85 − 10 = ______
4 × 10 = ______
8 × 10 = ______
49 + 20 = ______
93 − 10 = ______
80 − 10 = ______
2 × 10 = ______
