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
55 + 10 = ______
21 − 10 = ______
29 − 10 = ______
59 − 10 = ______
88 + 10 = ______
86 + 10 = ______
36 + 20 = ______
69 − 10 = ______
2 × 10 = ______
74 + 20 = ______
20 + 10 = ______
40 − 10 = ______
71 + 10 = ______
23 + 10 = ______
74 − 10 = ______
63 + 10 = ______
79 − 10 = ______
87 + 20 = ______
65 + 20 = ______
21 + 20 = ______
