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
39 + 10 = ______
12 + 20 = ______
40 + 20 = ______
87 + 20 = ______
9 × 10 = ______
33 − 10 = ______
53 + 20 = ______
40 − 10 = ______
31 + 20 = ______
7 × 10 = ______
33 + 20 = ______
54 − 10 = ______
68 + 20 = ______
42 − 10 = ______
22 + 20 = ______
11 + 10 = ______
20 + 10 = ______
65 + 10 = ______
1 × 10 = ______
86 − 10 = ______
