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
38 + 20 = ______
90 − 10 = ______
51 + 20 = ______
79 − 10 = ______
91 − 10 = ______
1 × 10 = ______
30 − 10 = ______
5 × 10 = ______
77 + 10 = ______
31 + 10 = ______
57 + 20 = ______
3 × 10 = ______
73 + 20 = ______
26 − 10 = ______
16 + 20 = ______
23 − 10 = ______
39 + 20 = ______
24 + 20 = ______
4 × 10 = ______
42 − 10 = ______
