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 + 20 = ______
60 − 10 = ______
86 + 20 = ______
55 + 10 = ______
39 + 20 = ______
58 + 10 = ______
61 + 10 = ______
43 + 20 = ______
58 − 10 = ______
55 − 10 = ______
46 − 10 = ______
22 − 10 = ______
3 × 10 = ______
35 − 10 = ______
5 × 10 = ______
61 − 10 = ______
8 × 10 = ______
11 + 10 = ______
78 + 10 = ______
71 + 20 = ______
