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
57 + 20 = ______
50 − 10 = ______
7 × 10 = ______
66 − 10 = ______
40 + 20 = ______
62 − 10 = ______
92 − 10 = ______
46 − 10 = ______
14 + 20 = ______
5 × 10 = ______
81 + 10 = ______
80 + 20 = ______
51 + 20 = ______
65 + 20 = ______
20 + 20 = ______
73 + 20 = ______
67 + 20 = ______
1 × 10 = ______
22 + 20 = ______
60 − 10 = ______
