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
49 + 10 = ______
15 + 20 = ______
62 − 10 = ______
67 − 10 = ______
90 − 10 = ______
61 + 20 = ______
4 × 10 = ______
70 − 10 = ______
89 − 10 = ______
8 × 10 = ______
43 + 10 = ______
68 + 20 = ______
1 × 10 = ______
16 + 20 = ______
81 + 20 = ______
70 + 20 = ______
41 − 10 = ______
18 + 20 = ______
40 + 20 = ______
85 − 10 = ______
