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
83 + 20 = ______
88 + 10 = ______
75 + 10 = ______
65 − 10 = ______
9 × 10 = ______
57 − 10 = ______
61 − 10 = ______
5 × 10 = ______
63 − 10 = ______
34 − 10 = ______
99 − 10 = ______
23 + 10 = ______
54 + 20 = ______
75 + 20 = ______
3 × 10 = ______
45 + 20 = ______
23 − 10 = ______
47 + 20 = ______
67 + 20 = ______
81 + 20 = ______
