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
19 + 10 = ______
83 − 10 = ______
40 + 10 = ______
20 + 20 = ______
2 × 10 = ______
8 × 10 = ______
85 + 20 = ______
26 + 10 = ______
29 + 20 = ______
57 − 10 = ______
62 − 10 = ______
1 × 10 = ______
51 + 10 = ______
75 + 10 = ______
63 + 10 = ______
42 + 20 = ______
28 − 10 = ______
5 × 10 = ______
7 × 10 = ______
15 + 20 = ______
